I had sex on 14 September and my period date was on 15 September but my period didn't came till 17 .I got confirmed on 18 September that i am pregnant I took preganews to confirm .so on 19 I took mifegest kit first tablet and on next day I took the other 2 tablet and I got my bleeding for 4 days. 23 I was finished with my bleeding and on Oct I took preganews test it was negative and I had my menses on Oct but I was scared and I went for an ultrasound on November 10 and report came normal nothing found according to report. And got my period on Nov but comparing to my normal period days it was low. I have 3 days of my period normally but I came for 2 days on November. And I feel like headache and very lazy. I don't know this is because of my tension or something serious. i am under age so i am getting very worried about this I took a preganews urine test today on 17 Dec it came normal. Is everything alright plzz help me.